How to solo mine on a GPU
First you'll want to download and unzip sgminer from
https://mega.co.nz/#!2JYXHDpD!OOiFOdsh5rnvk1zhz5niXENNzbgnw1UXwmFcicBzevI
Then you need to make sure that you've copied the logicoin.conf into your appdata/roaming/logicoin directory.
Once you've done that you should open notepad and paste the following into it.
sgminer.exe -k darkcoin -o localhost:9652 -u user -p password
Now save that as logicoin.bat inside your sgminer folder. Make sure that when your saving it you have "Save as Type" set to "All Files"
Now make sure the wallet is running and then simply run the .bat file you created above.